Do I have Oval or Square Ports on my Manifold?

[74bigblock]

Do I have Oval or Square Ports on my Manifold? Anyone know the stock config of the LS4??? (I assume Oval, but thought I'd check to make sure)!

Thanks!
Dave

 

[Yoda]

The intake I find in my reference's show 1 intake # for 1974 402-454 including Corvette and that number is 393841 Cast Iron Oval Port
It also appears most the Square Ports where Aluminum..

Bud

 

[74bigblock]

The intake I find in my reference's show 1 intake # for 1974 402-454 including Corvette and that number is 393841 Cast Iron Oval Port
It also appears most the Square Ports where Aluminum..

Bud

Thanks Bud.. confirms my thoughts. There is no way that sucker is aluminum!

-Dave

 

[JohnZ]

The original stock '74 LS4 used two different intakes - 353015 or 336789; both are cast iron, and have oval ports. 393841 was never used on a Corvette - only on passenger cars and trucks.